1 /* $NetBSD: opendisk.c,v 1.13 2014/09/29 21:04:52 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 __RCSID("$NetBSD: opendisk.c,v 1.13 2014/09/29 21:04:52 christos Exp $"); 39 #endif 40 41 #include <sys/param.h> 42 43 #include <assert.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #ifndef HAVE_NBTOOL_CONFIG_H 47 #include <util.h> 48 #include <paths.h> 49 #else 50 #include "opendisk.h" 51 #endif 52 #include <stdio.h> 53 #include <string.h> 54 55 static int 56 __opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked, 57 int (*ofn)(const char *, int, ...)) 58 { 59 int f, rawpart; 60 61 if (buf == NULL) { 62 errno = EFAULT; 63 return (-1); 64 } 65 snprintf(buf, buflen, "%s", path); 66 67 if ((flags & O_CREAT) != 0) { 68 errno = EINVAL; 69 return (-1); 70 } 71 72 rawpart = getrawpartition(); 73 if (rawpart < 0) 74 return (-1); /* sysctl(3) in getrawpartition sets errno */ 75 76 f = ofn(buf, flags, 0); 77 if (f != -1 || errno != ENOENT) 78 return (f); 79 80 snprintf(buf, buflen, "%s%c", path, 'a' + rawpart); 81 f = ofn(buf, flags, 0); 82 if (f != -1 || errno != ENOENT) 83 return (f); 84 85 if (strchr(path, '/') != NULL) 86 return (-1); 87 88 snprintf(buf, buflen, "%s%s%s", _PATH_DEV, iscooked ? "" : "r", path); 89 f = ofn(buf, flags, 0); 90 if (f != -1 || errno != ENOENT) 91 return (f); 92 93 snprintf(buf, buflen, "%s%s%s%c", _PATH_DEV, iscooked ? "" : "r", path, 94 'a' + rawpart); 95 f = ofn(buf, flags, 0); 96 return (f); 97 } 98 99 int 100 opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked) 101 { 102 103 return __opendisk(path, flags, buf, buflen, iscooked, open); 104 } 105 106 int 107 opendisk1(const char *path, int flags, char *buf, size_t buflen, int iscooked, 108 int (*ofn)(const char *, int, ...)) 109 { 110 111 return __opendisk(path, flags, buf, buflen, iscooked, ofn); 112 } 113